Curated OER
Triangle Sums
Fourth graders determine a way to place numbers in the nine circles that are arranged in a triangular pattern so that each side has an equal sum. They use each number once and practice adding single digit numbers.
PBS
Pbs Learning Media: Rotational Symmetry
This interactive exercise looks at angles of rotation and rotational symmetry of a variety of figures.
Other
Ic Teachers: Rotational Symmetry
This website contains a basic explanation of what rotational symmetry and rotational symmetry order is. Some practice problem identifying rotational symmetry order are also given.
Math Is Fun
Math Is Fun: Rotational Symmetry
A definition and several examples of rotational symmetry. View two animations showing types of rotational symmetry, as well as real-life examples, including a dartboard and Ferris wheel.
CK-12 Foundation
Ck 12: Geometry: Rotation Symmetry
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to determine whether or not a shape has rotation symmetry.
CK-12 Foundation
Ck 12: Geometry: Rotation Symmetry
[Free Registration/Login may be required to access all resource tools.] Find a figure's angle of rotation.
CK-12 Foundation
Ck 12: 2.9 Rotation Symmetry
Find out about the ways to name rotation symmetry: order, fraction of a turn, and angle.
McGraw Hill
Glencoe: Self Check Quizzes 1 Symmetry
Use Glencoe's randomly generated self-checking quiz to test your knowledge of lines of symmetry and rotational symmetry. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click...
Annenberg Foundation
Annenberg Learner: Learning Math: Symmetry
This presentation provides a tutorial on symmetry. In the tutorial, you will do the following: learn about geometric symmetry, explore line or reflection symmetry, explore rotation symmetry, and explore translation symmetry and frieze...
Analyze Math
Analyze Math: Rotation Symmetry of Geometric Shapes
An applet is used to explore the rotation symmetry of geometric shapes. [Requires Java.]
Analyze Math
Analyze Math: Rotation Symmetry of Regular Polygons
An applet is used to investigate the rotation symmetry of regular polygons.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Given Shapes Are Rotationally Symmetrical
[Free Registration/Login may be required to access all resource tools.] Students watch a video to determine if given shapes have rotational symmetry and then take an assessment to test their skills.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Given Shapes Are Rotationally Symmetrical
[Free Registration/Login may be required to access all resource tools.] For this learning module, students examine shapes to determine if they have rotational symmetry. Includes video demonstrating a sample problem [1:31] and a set of...
CK-12 Foundation
Ck 12: Elem Math: Determining Whether Given Shapes Are Rotationally Symmetrical
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are asked to look at 2D shapes and decide if they have rotational symmetry. Includes video demonstrating a sample problem and a set...
CK-12 Foundation
Ck 12: Geometry: Rotations
[Free Registration/Login may be required to access all resource tools.] Recognizing and identifying rotation transformations and rotational symmetry
Mathigon
Mathigon: Geometry: Symmetry
This lesson focuses on symmetry including reflectional symmetry, rotational symmetry, and palindromes. It defines each, gives examples, and practice activities.
Other
Teach Net: Rotational Symmetry
An explanation from Teachers Network of what rotational symmetry is along with some examples that show this.
Sophia Learning
Sophia: Rotational Symmetry: Lesson 5
This lesson defines the phrase rotational symmetry. It is 5 of 11 in the series titled "Rotational Symmetry."
Sophia Learning
Sophia: Rotational Symmetry: Lesson 6
This lesson defines the phrase rotational symmetry. It is 6 of 11 in the series titled "Rotational Symmetry."
Khan Academy
Khan Academy: Symmetry of 2 D Shapes
Analyze various shapes according to their reflective and rotational symmetries. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Geometry: Lines of Symmetry
[Free Registration/Login may be required to access all resource tools.] Distinguish between line symmetry and rotational symmetry
Khan Academy
Khan Academy: Symmetry of 2 D Shapes
Analyze various shapes according to their reflective and rotational symmetries.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Tessellations and Transformations
Investigate tessellations using this interactive Learn Alberta math resource. Students will explore transformations, namely line symmetry, rotation symmetry, and translation occurring within a tessellated pattern. Be sure to follow the...
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